Camera Lens Position Sensor Between Coil and Yoke
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Solution Overview
Problem
Portable camera lens modules with image stabilization functions face challenges in achieving precise and rapid driving due to the magnetic field generated by coils, which interferes with the position sensor's accuracy and speed, leading to reduced performance.
Innovation Solution
The position sensor is strategically located between the coils in the driving portion to minimize the influence of the magnetic field, preventing malfunctions and improving the driving force and performance of the camera lens module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the position sensor is located at the central side of the interior of the coil, then the structure is compact, but the magnetic field induced by the coil interferes with the position sensor's detection accuracy and speed
Solution Approach 1:
The position sensor is extracted from the coil interior and relocated to the coil exterior, specifically positioned between the coil and the yoke portion. This extraction removes the sensor from the harmful magnetic field environment while maintaining the compact overall structure of the actuator.
Solution Approach 2:
The yoke portion serves as an intermediary structure that provides a mounting surface for the position sensor. By positioning the sensor between the coil and the yoke, the yoke acts as a mediator that allows the sensor to be close to the coil for compactness while being shielded from direct magnetic field interference.
2Device complexity
If the position sensor is located at the central side of the interior of the coil, then the structure is simple, but the magnetic field causes malfunctions and reduces driving precision and speed
Solution Approach 1:
The position sensor is extracted from the coil interior to the exterior space between the coil and yoke portion. This simple relocation eliminates the magnetic field interference problem without adding complex shielding structures or changing the overall actuator design, thus maintaining structural simplicity while improving reliability.
3Adaptability or versatility
If coils are used to drive various functions and image stabilization, then high functionality is achieved, but the magnetic field generated reduces the accuracy and speed of image stabilizing
Solution Approach 1:
The position sensor is extracted from the magnetic field environment to accurately detect the position of the movable core during rapid image stabilizing operations. This allows the system to maintain high functionality with coils while achieving accurate and rapid image stabilizing by preventing magnetic field interference with position detection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the accuracy and speed of image stabilization, preventing malfunctions and improving the overall performance of the camera lens module by isolating the position sensor from the magnetic field's interference.
Implementation Method 1
a position sensor located at the central side of the interior of the coil cannot detect the accuracy and the speed of the driving due to a magnetic field induced by the coil
Implementation Method 2
a position sensor located at the central side of the interior of the coil cannot detect the accuracy and the speed of the driving due to a magnetic field induced by the coil
Data Source
AI summary
A camera lens module includes a base portion to which an image stabilization carrier is mounted; two or more magnets provided in the image stabilization carrier; a coil portion including a plurality of coils and corresponding to each of the magnets; and a position sensor located between the coils. In addition to the above embodiment, various other embodiments can be implemented.